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Internal Flows: DR Majeed Safar Jasim Email: Mjasim@uob - Edu.bh

The document discusses various types of fluid flow problems, highlighting methods to calculate head loss, flow rate, and diameter using the Swamee and Jain relation. It includes two examples: one involving heated air in a plastic duct and another involving water in a stainless steel pipe, both requiring calculations for pressure drop, head loss, and pumping power. The document emphasizes the use of the Moody diagram and the Colebrook equation to determine friction factors.

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23 views15 pages

Internal Flows: DR Majeed Safar Jasim Email: Mjasim@uob - Edu.bh

The document discusses various types of fluid flow problems, highlighting methods to calculate head loss, flow rate, and diameter using the Swamee and Jain relation. It includes two examples: one involving heated air in a plastic duct and another involving water in a stainless steel pipe, both requiring calculations for pressure drop, head loss, and pumping power. The document emphasizes the use of the Moody diagram and the Colebrook equation to determine friction factors.

Uploaded by

its.m7jm
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Internal Flows

Dr Majeed Safar Jasim


Email: mjasim@uob.edu.bh
Types of fluid flow problems
Moody diagram
Swamee and Jain
To avoid tedious iterations in head loss, flow
rate, and diameter calculations, Swamee and
Jain (1976) proposed the following explicit
relation:
Example (1)
Heated air at 1 atm and 35°C is to be
transported in a 150-m-long circular
plastic duct at a rate of 0.35 m3/s. If
the head loss in the pipe is not to
exceed 20 m, determine the minimum
diameter of the duct.
Example (1)
Example (1)
Example (1)

4 Equations, 4 unknows, Use Solver


Example (1)
Example (1)
Example (2)
Water at 60°F (𝜌 = 62.36 lbm/ft3
and 𝜇 = 7.536 × 10−4 lbm/ft·s) is flowing
steadily in a 2-in-diameter horizontal pipe
made of stainless steel at a rate of 0.2 ft3/s.

Determine the pressure drop, the head


loss, and the required pumping power
input for flow over a 200-ft-long section of
the pipe.
Example (2)
Example (2)
Example (2)

To avoid any reading error, we determine f


from the Colebrook equation on which the
Moody chart is based

Using an equation solver, the friction factor


is determined to be f = 0.0174
Example (2)

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